Device for removing parts from wells



June 16, 1931. c. BROWN 1,810,753

I DEVICE FOR REMOVING PARTS FROM WELLS Filed July 23, 1930 2 Sheets-Sheet l Z 17 Z2 Z3 423 24 1 1 -21 1 4E 23" \=Z4 Z! ATTORNEY June 16, 1931.

C. BROWN DEVICE FOR REMOVING PARTS FROM WELLS Filed July 23, 1930 2 Sheets-Sheet 2 V as Patentecldune 16,1931 7' 'oonnnrrus BROWN, or Bar-nor, OKLAHOMA,

bEvIoE: roe REMOVING; riin'rs Freon WELLS Application filed July 23,

This invention relates to a novel device for removing drilling tools and other parts from. a well and the invention has as one of its objects to provide a device for this purpose which may be very-conveniently employed and whichwill prove readily efficient in auto-; matically gripping and holding the drill bit, well tubing, or other parts, which may have x become lodged in a Well frame. This invention also consists in certain other features of construction and in the combination and arrangement of the several parts to be hereinafter fully described, illustrated Q in the accompanying drawings, and specifi cally pointed out'in the appended claims, it a being understood orcourse vthat minor changes may be made so long as they fall within-the scopeof the-claims.

In describing my invention in detail, ref-i 29 erence will be had to the accompanying drawings, wherein like characters denote like or corresponding parts throughout the several views, and in which: V

Figure l is a vertical sectional viewillus trating one embodiment of the invention, the I parts being shown in the positions which they will assume at thetime the device is inserted into a well tube. Figure 2 is a similar view illustrating the 9 positions assumed by the parts when the device is being drawn upwardly out of the well tube and has gripped the'part tobe removed from the well. I Figure 3 is, a, horizontal sectional View taken on the line 33 of Figure 2, looking in the direction indicated by the-arrows. v

Figure dis a simila view on the line 4-4 of Figure 2., 1 V I i s Figure 5-is a view similar to- Figure 1,illustrating a modification of the invention.

Figure .6 is a horizontal sectional view taken substantiallyon'the line 6 6 of Figure 3, looking in the direction indicated by the p Inthedrawings the numeral 1 indicates in general a welltube and in Figure 1 of the drawings two sections of the-tube are illustrated and are shown connected by a coupling collar 2. The device embodying the invention comprises a hollow tubular barrel 3 a the said tube;

1930. Serial N01 470,182.

which is provided in its upp'er end with an openingit and this barrel is exteriorly of a diameter to fit freely,eslidably, within the W611 tube 0 the sections of which said tube I V is made up. I l a upon the stem and bears at its lowerend againstthe upper end of the barrel 3 and at its upper end against the under side of the collar Above the collar 7, the stem is formed with a threaded conical end 9 by 'means of which it may be connected with any part of a well drilling apparatus or well pumping apparatus, whereby thedevice of the'invention ma be lowered into the well tube 1 to engage and grip the partto be removed and then pulled upwardly through A sleeve '10 is interiorly threaded at its upper end asjat 11 and this sleeve'is fitted onto the lower threaded end 6 of the stem 5. The sleeveisexteriorly'of a diameter to fit freely, slidably in' thebarrel 3 and this sleeve'is formed at its lower portion with diametri cally, oppositely. located, vertically extending e recesses 12 which provide diametrically, opr positely located clamping members l3 which of" course extend downwardly from the undivided-portion of the sleeve, and each of these clamping portions isprovided upon its inner side and atits lower end, with an inwardly projecting portion 14 which isadapted to engage 'be neatha head or collar-15 at the upper end of a pip'e'section or the like indicated by. the numerahlG, this-collar or head and pipe section'being shown in dotted lines in Figure 2. It will be observed that the inner sides of the portions 14' are downwardly and outwardly inclined, and at their upper sides are fiat so that when thevsleeve 10 is lowered and brought-into engagement with the upper end of the part'to bereinoved, the portions lewill readily ride over said endof the part until theirupper sides engage'beneath the 7 upper side of the head or flange upon said part. i

against the upper side of the head 18 upon the stem 17.

Below the head 19, the stem is formed with a diametric slot 21 in which are pivotally mounted the inner ends of-fingers 22, the outer ends of the fingers being beveled as indicated by the numeral 23. Each of the clamping members 13 is formed with a vertical series of openings 24, and similar openings are likewise formed in the lower portion of the sleeve above the recesses 12, and these openings are of a size to permit of the extension of the fingers 22 therethrough. Each opening 24 has a horizontal top wall, as will be observed by reference to Figures 1 and 2, and-a downwardly and outwardly inclined bottom wall 25, and it will be evident by a comparison of Figures 1 and 2, that the fingers 22 may assume a horizontal position engaging at their upper sides against the under side of the head 19 and projecting through any pair of the openings 24: so as to engage beneath the lower end of the barrel 3 and, where the device is lowered into a well tube comprising sections, the outer ends of the fingers may engage also in the space between the lower end of the upper section and upper end of the lower section of the well tube. The lower end of the stem 17 is preferably located somewhat below the lower head 19 and therefore below the pivoted ends of the fingers 22, and therefore is adapted to come into engagement with the upper end of the drill bit, pipe section, or other part, which is to be removed by the use of the device, when the device hasbeen lowered into the well tube a sufficient distance.

As stated above, the portions 14 of the clamping members 13 are adapted to ride over a collar or shoulder or head upon a bit or pipe'section, and therefore the sleeve .10 will preferably be made of steel so as to possess the required degree of resiliencyto permit of a slight stretching of the members 13, for this purpose. By reference to Figures 1 and 2 it will he observed that when the device is lowered into the well tube the upper spring 8 will be permitted to expand due to the upward shifting of the stem 17 through the engagement of this stem against the upper end of the part to be removed and, at such time,the sleeve will be moved upwardly into the barrel 3 and the stem 5 will likewise be moved upwardly through the opening 4 in the barrel and, in this upward movement of the stem 17, the spring will be compressed due to the engagement of the upper end of the sleeve 10 against the upper end of the barrel 3, and likewise. due to the binding of the outer ends of the fingers 22 in the openings 24 in which they are engaged, and therefore a direct upward pulling force will be imposed, by the device, upon the part to be lifted or removed from the well tube.

In thepreceding embodiment of the invention, the device is designed primarily for use in removing drills or other parts having heads or collars beneath which the parts 14 ofthe clamping members 13 might engage, but inasmuch as it is at times necessary to remove a threaded pipe section, the embodiment illustrated in Figures 5 and 6 is designed for this particular use, and inasmuch as, except for the difference in the formation of the clamping members 13, this embodiment does not in any way differ from the one shown in Figures 1 to 1 inclusive, the same reference numerals, primed, are employed to indicate like parts.

In thisembodiment, each clamping member 13 instead of being formed with a head such as the head 14- is formed upon its inner side with threads 26 so that these threads maybe brought into engagement with the threads 27 a the upper end of a pipe 28 which is to be removed.-

lVhat I claim is:

1. In a device for removing drilling tools and other parts from a well, a hollow tubular barrel, a stem having a threaded upper end to adapt it to be connected to a part working in the well for up and down movement, the said stem fitting slidably through the upper end of the barrel, and havingan abutment near its upper end, a compression spring fitting the said stem and bearing between the abutment and the said end of the barrel, a sleeve fitted, at its upper end, to the lower end of the stem, clamping members extending downwardly from the lower end of the sleeve and having inwardly directed portions to engage beneath a head, or the like, upon the part to be removed, a stem having spaced heads slidably fitting inthe sleeve, the sleeve being formed, in each of its clamping members with a series of openings, and fingers pivotaliy mounted, at their inner ends in the lower portion of the stem andengageable, at their outer ends in the said openings in the respective ciamping members.

2. In a'device for removing drilling tools and other parts from a well, a hollow tubular barrel, a stem having a threaded upper end to adapt it to be connected to a part workingin the well for up and down movement, the said stem fitting slidably through the upper end. of the barrel, and having an abutment near its upper end, a compression spring fitting the said stem and bearing between the abutment and the said end of the barrel, a sleeve fitted, at its upper end, to the lower end of the stem, clamping members extending downwardly from the lower end of the sleeve and having inwardly directed portions to engage beneath a head, or the like,-upon the part tobe removed a stem having spaced heads slidably fitting in the sleeve, a compression spring within the sleeve engaging between the upper one of the heads, upon the stem, and the lower end of the first mentioned stem, the'sleeve being formed, in each of its clamping members with a series of openings, and fingers pivotally mounted, at their inner ends in the lower portion of the stem and engageable, at their outer ends, in the said openings in the respective clamping members.

3. In a device for removing drilling tools and other parts froma well, a hollow tubular barrel, a stem having a threaded upper end to adapt it to be connected to a part working in the well for up and down movement, the said stem fitting slidably through theupper end of thebarrel, and having an abutment near its upper end, a compression spring fitting the said stem and bearing between the abutment and the said end of the barrel, a sleeve fitted, at its upper end, to the lower end of the stem, clamping members extending downwardly from the lower end or" the sleeve and having inwardly directed portions to engage beneath a head, or the like, upon the part to be removed, a stem having spaced heads slidably fitting in the sleeve, the sleeve being formed, in each of its clamping members with a series of openings, and fingers pivotally mounted, at their inner ends in the lower portion of the stem and engageable, at

their outer ends in the said openings in the respective clamping members, the upward swinging movement of the fingers being limited by their engagement against the under sideofthe lower head upon the stem.

4. In a device for removing drilling tools and other parts from a well, a hollow tubular barrel, a stem having a threaded upper end to adapt it to be connected to a part working in the well for up and down movement, the said stem fitting slidably through the upper end 01' the barrel, and having an abutment near its upper end, a compression spring fitting the said stem and hearing be tween the abutment and the said end of the r barrel, a sleeve fitted, at its upper end, to the lower end of the stem, clamping members extending downwardly from the lower end of otally mounted, atfltheir inner ends, in the lower portion of the stem and engageable, at

their outer ends in the said openings in the respective clamping members.

In testimony whereof I aifix my signature.

CORNELIUS BROWN. 

